Pressure-control valve



Dec. 23, 1930. F. BAUMGARTNER 1,785,759

PRES SURE CONTROL VALVE Filed June 18, 1928 2 Sheets-Sheet l 319 F 33 3,2 z 0 d 2s Q Z7 4 l hwenor E "Fre Taummrner Dec; 23, 1930. l F. `BALMGARTNER 1,785,759

PRESSURE CONTROL VALV Filed June 18. 1928 2 Sheets-Sheet 2 Fred uumpulger 3%; M M

Patented Dec. 23, v1930 l 1,7

' UNITED STATES PATENT oFIFlcE BAUHGABTNEB, F IUSKEGON, MICHIGAN PRESSURE-CONTROL VALVE Application illed June 18, 1928. Serial No. 286,101.

This invention relates to a pressure control head thereof throu h which an adjusting apparatus b means of which the pressure scnew 13 passes, where y the member 12 may o a fluid w ich' is variable and/or greater be adjusted different distances away from the than a constant'pressure desired for use can head 5 and in this manner vary the force of 5 be controlled to provide the constant or vathe spring 11 and adjust it to any desired 55 riable ressure desired. The apparatus also pressure strength. y is avai able for completely shuttingy oil the A connecting pipe 14 made up of several pressure when needed. The apparatus may elements, such as mpples, elbows and the like, be used inconjunction with a variety of deconnects the opposite ends of the c linder 2. 17 vices, one pla/ce of use lbeing for applying In said pipe a shut-off valve 15 is located 5 pressure to a brake. l v which maybe manually operated to o en or The invention consists of many novel declose the assage to the plpe to lany esired tails -of construction and arrangements of degree,'th1s being for the urpose of effectparts for effectively attaining the ends stated, ving a dash-pot regulation oi3 the movement of 15 as well as many others not at this time enuthe piston 9 as will hereafter appear.

merated, which will appear upon understand- In the upper side of the cylinder 3 are two ing ofthe invention from the following deinletports 16 and 17 leading to opposite ends yscription taken in connection with the acof the cylinder, and an exhaust port 18, very companying drawings, in which: similar to the ports used in the ordinary re- 20 Fig. 1 is a plan view of the apparatus. crprocating steam engine. A valve housing 7 "Fig, 2 is a longitudinal vertical section 19, similar to the steam chest in a steam entherethrough with certain parts broken away gine, is attached to the upper side of the cylinfor clearnessof disclosure. der 3 covering the upper ends of all the ports Fig. 3 is a vertical section substantially on i described. A sliding valve 20, similar to the '25 the plane of line 3--3 'of Fig. 2. slide valve used in reciprocating .steam en- 75 `F1g.`4 is a fragmentary sidey elevation of gines, is mounted in the valve housing 19 to the apparatus shown in Fig. 1, the elevation which a valve rod 21 is secured extending being that part of the apparatus at the left, outward toward the opposite cylinder 2. andV Sliding movement of the valve 2O may un- 30 Fig. 5 is a fragmentary section and diacover either port 16 or 17 dependent upon 3 grammatic view of a simpler form of the the direction 1n which the valve is moved and apparatus but operating upon the same prinwhen either of the ports 16 or 17 is fully ci le. e v uncovered the other port 16 or 17 is connected ike reference characters refer to like parts with the exhaust port 18'as is evident. in the dierent figures of the drawings. A bracket 22 extends outwardly from the 95 In the construction abase 1`of cast metal, cylinder 3 on which an operating lever 23 is preferably, is provided, at the opposite ends pivotally mounted between its ends. f .A secof which c linders 2 and 3 are formed. The ond bracket 24 extends from .the cylinder 2 cylinder 2 1s closed at its ends by heads 4 and to a point substantially midway between the 40 r5 and the c linder 3 b heads and 7, as best two cylinders on which a lever 25 is pivotally 9 shown in ig. 2. A orizontal piston rod 8 mounted between its ends at 26. The lower extends between the cylinders through the end of the lever 25 below the pivot 26 is v adjacentheadsand 6-thereof and ise uipped formed with a fork 27 which embraces the at one end, within the cylinder 2, wit a ispiston rod 8 to which it is pivotally conton 9 and at, the other end, within the'cy innected, as best shown in Fig. 3. A bar 28 95 der 3, with a piston 10. is pivotally `connected at its upper end at 29y Aheavycoiled compression spring 11 bears tothe upper end of the lever 25, extends at one end against t e piston 9 and at the downwardly between the cylinders and has other end av ainst a member 12 adjustably its lower end connected with the lower end mounted wit in the cylinder 2 adjacent the of the operating lever 23 by a tie rod 30. l

"Links 21a connect the valve rod 21 with the bar 28.

A fluid under pressure, such as compressed air or the like, leads from any suitable source of supply through a pipe 3l to the valve housing 19. When -the valve is in the position shown in Fig. 2, the fluid under pressure cannot enter'either of the orts 16 or 17 By grasping the upper end o the operating lever 23 (referring to Fig. 2) and moving it to the left, the bar 28 is turned` in a counterclockwise direction about its pivot 29 thereby drawing the links 21a with it and moving the slide valve 2O to uncover the port 16, whereupon compressed fluid passes through said port into the left-hand end of cylinder 3. This cylinder 3 has an outlet 33, (see Fig. 4) through which the compressed fluid may be carried by any suitable conduit connected with the cylinder at said outlet to the brake or other mechanism which is to be acted upon by pressure. When the pressure at the left of the piston 10 reaches a certain predetermined amount, sufficient to overcome the spring 11, the piston 10 with the rod 8, and also the piston 9, are moved to compress spring 11 with a consequent turning movement of the lever 25 about its pivot 26 thereby moving the pivot" 29 to the leftwith a consequent movement of the valve 20 tothe left to cover or partly cover the upper end of the portf16.

l wlth may `This'cuts ofi' all or a part of the flow of the `Huid through the port 16 to the cylinder 3 a consequent reduction 'in pressure, and eventually the port 16 will be opened just suflicient that the pressure acting upon the piston 10 will balance the spring pressure of the spring 11 and therel will be uniform and 'constant pressure of the fluid in the cylinder 3 andto'the brakeorbtherdevice acted upon thereby, the degree of this pressure varying vWith the position of the lever 23 and its associated parts. A v

-If on the other hand, the upper end of the lever 23is turned in a clockwisefdirection to the right, the port 17 will be opened to receive the compressed fluid. Piston 10 will immediately move to the left, ythere WillV be no resisting spring pressure and the flow of uid through the port 17 Will be uncontrolled in any manner whereby pressure acting upon the brake orother apparatus Will be that of the source of suppl of the fluid. The righthand end-,of cylin er 3 is provided with an outlet port 34 to which a pipe or other conduit be connected to carry the compressed fluid to its place of y connected with the exhaust port 18 and a conductin pipe mayor may not be connected'to the cy inder at suchopening. y

The pi e 14 connecting opposite ends of the cylin er 2 with the valve 15 therein, serves to check too rapid operation of the apparatus. That is, operation of the operating lever 23 cannot 4ta e place quickly or rapidly, as

Y there is lno use- The outlet at 32 is the flow of fluid from one end of c linder 2 to the other past the valve 15 will c eck any such attempted operation. After the lever has been moved to open the port 16 and the pressure of the fluid balanced against the spring 11 is applied to the brake or other device, release may be effected by moving the lever 23 backward past itsgneutral point to a position where its associated parts will move the valve 20 to communicate the port 16 with the port l8through which the pressure is released.

vIn Fig. 5 a diagrammatic form of a simpler construction is shown eliminating the cylinder'2 and alsol eliminating the .possibility of uncontrolled pressure. In this case the compression spring 11a is located in the cylinder 3 between the piston 10a and the head 6a of .the cylinder. Thev inlet port 16a and theoutlet 33a correspond to the' port 16 and outlet 33 of the first described'device. The exhaust port 18a corresponds to the exhaust port 18 of the structure first described. The slide valve 20, the pistonr ro'd 8a, valve rod 21 and the various levers and bars 25 and 28 with the forkedconnection at 27 vof lever 25 to the piston rod 8a is similar in all respects to the structure first'described. The operation of the device is identical with that first described excepting that the operating lever will be moved inone direction only as part corresponding to the port 17 toy introduce the compressed fluid intovthe right-hand end of quently there is no means present for applying uncontrolled pressure to. the brake or other device with which itis used.

the cylinder.' Conse- The extent of movement of the leverf23 in the first instance controls thepressure which eventually will bey constantly applied' to the brake or other apparatus influenced` thereby. By moving thelever 23 to operate valve 20 a greater or less distance, so that the port 16 is uncovered either partly or entirely, it is evil dent that the controlled pressure exerted will be greater or less in proportion lto the extent of operation of the lever y23, this, irrespective of what the pressure may be in the source of supply ofthe compressed fluid.

, This invention is very practical and efficient for-the purpose for `which ,it is designed. It is durable and is of compact form. yThe invention is defined inthe appended claims and is to be considered comprehensive of all forms of structure comingwithin their scope. I claim: v 1. In a construction of the class described, ar cylinder, a valve housing vconnecting lwith said cylinder, a piston in the'cylinder,4 a valve in the valve housing, there beingv a port connecting said valve housing and one end of the cylinder with the valve adaptedk in one posi- I said valve, sprmgmeans tending to move iso ' lower end with said piston rod, abar pivotally connected at its upper end to the upper end of said lever, means connecting the valve rod with said bar, and manuallyI operable means for turning said bar about its point of pivotal connection to said lever to thereby change the position of said valve.

2. An apparatus of thecharacter described comprising, a horizontal cylinder, a valve housing connected with said cylinder at its upper side into which fluid under pressure is adapted to be carried, there being a port connecting said valve housing with one end of i the cylinder, a piston located within the cylinder, a piston rod extending from said piston through an end of the cylinder, a slide valve mounted in the valve housing adapted in one position to cover said port, a valve rod connected to said valve-and extending through the end of the valve housing above the piston rod, afixed support,`a vertical lever pivotally mounted between its ends on said support at a point a short distance above said valve rod, a vertical bar pivotally connected at its upper end to the upper end of the lever and extending downwardly to a point below said cylinder, means pivotally connecting the lower end of said lever with the piston rod, a link connection between said valve rod and said bar at a point between the ends of the bar, means connected with the lower end of the lbar for manually moving it to different positions, and spring means tending to move said piston toward the port end of the cylinder.

3. In a construction of the class described, a horizontal cylinder having closed ends, a second horizontal cylinder having closed ends located in alinement with the first cylinder, a piston in each cylinder, a piston rod connecting said pistons, a compression spring located between the piston in the second cylinder and one end of said cylinder tending to move both Aeo pistonsl lengthwise of said cylinders in one direction, a valve housing located at the upper side of the first cylinder, there being a port connecting said valve housing and the vend of said cylinder toward which its piston normally moves, means for carrying a fluid 'under compression into said valve housing, a slide valve mounted in the housing adapted to cover or uncover said port, a valve rod extending from the slide valve, a vertical lever pivotally mounted between its ends on a fixed pivot and having pivotal connection at its lower end to said piston rod at a-point between said cylinders, a vertical bar pivotally connected at its upper end to the upper end of the lever and extending downwardly to a oint below the cylinders, a link connection between said valve rod and said bar at a point between the ends of said bar, and means for manually moving said bar about its pivot 'to different positions.

4. Aconstruction containing the elements in combination defined in claim 3, there being a second port leading from said valve housing to the opposite end of the first cylinder over which said valve moves to close or open the same, and an exhaust port between said first and second ports, for the purposes described.

5. A construction containing the elements in combination defined in claim 3, combined with an adjusting screwthreaded through the outer head of thesecond cylinder, and a member located within said second cylinder adjacent said outer head thereof adapted to be adjusted toward or away from said head by the adjusting screw, said compression spring being located between the piston in said second cylinder and said member.

6. A construction containing the elements in combination defined in claim- 3, combined with a pipe conduit connecting the opposite ends ofthe second cylinder, and a valve located within said conduit adapted to be opened or closed to govern the effective area of the conduit. v

7. Ina construction of the class described, a horizontal cylinder, a second horizontal cylinder in alinement therewith, a piston in each cylinder, a piston rod connecting said pistons, a valve housing located at the upper side of the first piston there being inlet ports connecting said valve housing with the opposite ends of the cylinder and an exhaust port located between the inlet ports, a slide valve mounted in said valve housing to move back and forth over said ports, means for carrying a compressible fluid under compression into said valve housing, a vertical lever pivotally mounted on a fixed pivot between its ends having pivotal connection at its lower end with the piston rod, a vertical bar pivotally connected at its upper end to the upper end of said lever and extended to a point below said cylinders, a link connection between said bar and the valve rod, a second bracket extending from the first cylinder, a vertical lever pivotally mounted between its ends thereon, a rod connecting the lower end of the last mentioned lever and the lower end of the bar, and a heavy compression spring located in the second cylinder between its piston and the outer head of the cylinder, said first cylinder having outlets at each end thereof for the passage of the compressible fluid therefrom when it passes from the valve housing through said ports into the cylinder.

8. An apparatus of the class described comprising a cylinder, a piston in the cylinder, a passage communicating with said cylinder near one end, a valve in said passage, an outlet passage Acommunicating with said cylinder, sprin means to move the said piston toward the in et passage in the cylinder, a lever pivoted between its ends on a fixed pivot, means 'connecting oneend of said lever to said piston, a manual] operable lever pivoted to the opposite end o the fixed lever and means connecting said valve to said manually operable lever whereby movement of either of said levers will cause .movement of said valve.

9. An apparatus of the class described comprising a cylinder, a piston in the cylinder, two inlets, one communicating with each end of the cylinder, two outlet passages, one at each end ofthe cylinder, a-valve chamber having a valve therein arranged to close both inlet ports or to open either of them by movements in opposite directions, 'a supply pipe communicating with said valve chamber, spring means acting to move the piston toward one end of the cylinder, manualmeans lfor moving the valve in either direction. and automatic means associated with said manual 2O means and actuated bythe piston for moving the valve in either direction.

'10. The elements in combination defined in claim 9 combined 'withl means for restricting the speed of movement of the piston in either "5 direction. y

In testimony whereof I aiix my signature.

FRED BAUMGARTNER. 

